Consider the following statements.<br>1. Fragmentation is the common method of reproduction in algae, fungi and lichens.<br>2. Organisms which reproduce by fission are yeast and bacteria.<br>3. Reproduction by budding occurs in yeasts.<br>Which of the statements given above are correct about asexual reproduction methods?

Consider the following statements regarding algae: 1. Algae are chlorophyll-bearing simple, thalloid, autotrophic and largely aquatic organisms. 2. Algae reproduce only by asexual formation of different types of spores Which of the statements given above is/are correct?

A

1 only

B

2 only

C

Both 1 and 2

D

Neither 1 nor 2

Consider the following statements regarding sexual reproduction in plants: 1. Reproduction in plants takes place only through asexual methods. 2. Reproduction in spirogyra takes place through the process of fragmentation. 3. Vegetative propagation in plants can be achieved only by natural method. Which of the statements from above is/are correct?

A

1 and 2 only

B

2 and 3 only

C

2 only

D

1 only

Which of the following pair of reproduction is correct? 1. Asexual Reproduction: Budding 2. Sexual Reproduction: Fragmentation

A

Only 1

B

Only 2

C

Both 1 and 2

D

Neither 1 nor 2

Which of the following are correctly matched with their mode of reproduction? A B a. Yeast i. vegetative propagation b. Potato ii. spore formation c. Algae iii. fragmentation d. Fungi iv. budding

A

a-iv, b-i, c-iii, d-ii

B

a-i, b-iii, c-ii, d-iv

C

a-ii, b-iv, c-iii, d-i

D

a-iii, b-ii, c-iv, d-i

Consider the following statements.
In a nuclear reactor, self-sustained chain reaction is possible because
1. More neutrons are released in each of the fission reactions.
2. The neutrons immediately take park in the fission process.
3. The fast neutrons are slowed down by graphite.
4. Every neutron released in the fission reaction initiates further fission.
Which of these statements are correct?

A

Only 1, 2 and 3

B

Only 1 and 3

C

Only 2 and 4

D

Only 2, 3 and 4

Asexual reproduction differs from sexual reproduction in that in asexual reproduction, ________

A

The new organisms are genetically identical to the parent

B

The gametes are produced in reproduction

C

The nuclei of gametes fuse

D

The offspring shows variations

Asexual reproduction differs from sexual reproduction in that in asexual reproduction, ______

A

the new organisms are genetically identical to the parent

B

the gametes are produced in reproduction

C

the nuclei of gametes fuse

D

the offspring shows variations

Yeast grows exponentially through budding. If one budding cycle takes 90 minutes, what will be the population of yeast after 144 hours if the initial population N0 = 5?

A

480

B

5 × 296

C

96×25

D

144×25

Assertion (A): Amoeba reproduces by fission.
Reason (R): All unicellular organisms reproduce by asexual methods.

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true, but (R) is not the correct explanation of (A)

C

(A) is true, but (R) is false

D

(A) is false, but (R) is true

Consider the following statements about Fungi. (a) Fungi’s body is made up of a number of elongated, tubular filaments known as hyphae. (b) Their cell wall is made up of tough complex sugar, called chitin. (c) They practice asexual mode of production only. (d) They are usually defined as a group of prokaryotic organisms. Select the incorrect statements from the code given below:

A

a and b

B

c and d

C

a, c, and d

D

All of these

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